When Using MO as your mod manager it was not easy to install UI/HUD mods without the use of third party tools, which added a layer of complexity to the process of installing UI/Hud mods. Mod Organizers mod isolation feature prevented a mod being installed from seeing other mods that are required and some mods refused to even install due to not being handled properly, necessitating the use of FOMM to install UI mods as one big mod. MO has matured to the point where the mods I tried below installed without error and they will see other mods when being installed.
With the advent of UIO, the final obstacle to a working HUD in Fallout New Vegas has been removed. UIO does in MO what Unified hud did in Nexus Mod manager. UIO is a NVSE mod that dynamically creates the required Hud extensions at game launch allowing you to add, remove or change the order of UI hud mods in the priority order of MO.
We are still held to the MO last file wins rule though for a properly working setup. The list below can be used as a starting point for installing the mods you need. It is not an all-inclusive list and you can add mods to it or remove the ones you do not want. The way the list is ordered will give a working setup. If you find an element not working, look for the conflicts in the MO info pane and move your mods accordingly.
The following process will require that the overwrite folder be empty of all files and folders and unless otherwise stated the mods are installed via MO install. FOMM will be noted when needed and will require a FOMM reset, which is outlined below.
Important note, you can install UIO now, but do not enable the mod until you have finished installing your UI mods. This will prevent certain files from being changed or removed if you like to test while installing mods.
I hope that this helps others in setting up your UI in Fallout New Vegas. If you have any other mod success / fail stories please add them to this post.